雙層斜拉橋復(fù)合桁架節(jié)點(diǎn)受力性能研究.pdf

1、同濟(jì)大學(xué)土木工程學(xué)院碩士學(xué)位論文雙層斜拉橋復(fù)合桁架節(jié)點(diǎn)受力性能研究姓名：黃生富申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：劉玉擎20080601ABSTRACTABSTRACTShanghaiMinpuBridgeisdoubledeckcable—stayedtrussbridgewithmainspanof708mUpperdeckisbuiltforeight—lanebidirectionalexpresswaywhilel

2、oweroneisforsix1anebidirectionallocalhighwayThemainspanisdecktrussstructurecomposedoforthotropicdeckandsteeltrussandsidespanisalsodeck—trusscompositestructurecomposedofconcretedeckandsteeltrussCompositetrussjointofsidesp

3、anisthecompositestructurecomposedofsteelwebmembers、steelreinforcedconcretechords、prestressedconcretecrossbeams，cable—girderanchoragezoneandprestressedanchoragezoneTheformofjointsconnectiondetailstructureisfresh、complexan

4、dwithoutanyreferenceathomeandabroadThispaperbulitupmodelsofthreelevels：thespatialintegratedmodel、barsystemandsegmentgirdermixed—infiniteelementmodelandjointsdetailstructuresub—modelLoadingconditionsandloadingboundarycond

5、itionsofjointsmodelsweresolvedeffectivelyandtheanalysisonmechanicalbehaviorofcompositejointswererealizedLowerchordsjoints、uppermiddlechordsjointsanduppersidechordsjointsofcompositetrusstypicaljointswereselectedtobuildjoi

6、ntsolidmodelconsideringthefunctionsofshearstudsAnalysisoffactorsinfluencingthemechanicalbehaviorofjointswerecarriedoutSomeachievementsofhighreferencevalueforbridgedesignwereobtainedCreepcalculationofconcretewithANSYSsoft

7、warewasdiscussedatlastTheinfluenceofcreepoffilledconcreteinthesteelwebmemberoflowerchordjointatthetopofpieronthejointplatestressandshearforceofshearstudswasanalysedKeyWords：double—deckcable—stayedbridge，compositetrussjoi